Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715

24Vin/48Vout/200W DC-DC Converter

Rev. 5.2

Page 6 of 9

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+Sense from

other modules

in the array

+In

PC

PR

–In

+Out

+S

SC

–Out

–S

Figure 12—OR’ing diodes connections.

+Out

+S

SC

–S

–Out

+Out

+S

SC

–S

–Out

+Out

+S

SC

–S

–Out

Load

+S

–S

+S

–S

+S

–S

Module

2

Module

1

+In

PC

PR

–In

+In

PC

PR

–In

Module

N+1

+In

PC

PR

–In

Figure 11—N+1 module array output connections.

Figure 9—DC coupled single-wire interface.

Module 2

(up to 12)

Module

1

Ground plane

+Out

+S

SC

–S

–Out

+In

PC

PR

–In

+Out

+S

SC

–S

–Out

+In

PC

PR

–In

Module 2

(up to 12)

Module

1

Ground plane

+Out

+S

SC

–S

–Out

+In

PC

PR

–In

+Out

+S

SC

–S

–Out

+In

PC

PR

–In

Figure 10—AC coupled single-wire interface.

0.001µF

0.001µF

• The +Out and –Out power buses

should be designed to minimize

and balance parasitic impedance

from each module output to the

load.

• The +Sense pins should be tied

to the same point on the +Out

power bus; the –Sense pins

should be tied to the same point

on the –Out power bus.

• At the discretion of the power

system designer, a subset of all

modules within an array may be

configured as slaves by shorting

SC to –S.

• OR’ing diodes may be inserted in

series with the +Out pins of each

module to provide

module output fault tolerance.

CONTROL FUNCTIONS - PR PIN

Parallel Operation

The PR pin supports paralleling for increased power with N+1

(N+M) redundancy and phased array capability. Modules of

the same input voltage, output voltage, and power level will

current share if all PR pins are suitably interfaced.

Compatible interface architectures include the following:

DC coupled single-wire interface. All PR pins are directly

connected to one another. This interface supports current

sharing but is not fault tolerant. Minus In pins must be tied to

the same electric potential. See Figure 9.

AC coupled single-wire interface. All PR pins are connected

to a single communication bus through 0.001µF (500V)

capacitors. This interface supports current sharing and is fault

tolerant except for the communication bus. See Figure 10.

PIN STYLES

Description

Notes

Short solder

Requires in-board, mounting

Long solder

On-board mounting for 0.65" boards

Short ModuMate

SurfMate or in-board socket mounting

Long ModuMate

On-board socket mounting